The AAAA battery (or quadruple-A battery) is 42.5 mm long and 8.3 mm in diameter. The alkaline cell weighs around 6.5 g and produces 1.5 V. This size battery is also classified as R8D425 (IEC)IEC 60086-2-2011, p. 15. and 25 (ANSI/NEDA). The alkaline battery in this size is also known by Duracell type number MN2500 or MX2500 and Energizer type number E96.
Types Zinc–carbon Alkaline NiCd NiMH Li-ion IEC name R8D425 LR8D425 KR8D425 HR8D425 ANSI/NEDA name 25D 25A Typical capacity 300 mAh 500–600 mAh 325–500 mAh 160–170 mAh Nominal voltage 1.50 V 1.50 V 1.25 V 1.25 V 3.7 V Nominal mWh 450 mWh 750–950 mWh 406–625 mWh 592–629 mWh
Uses
This battery size is most often used in small devices such as laser pointers, LED penlights, powered computer styluses, glucose meters, and small headphone amplifiers, with Microsoft's Surface Pen the most prominent product taking AAAA batteries. These batteries are not as popular as AAA or AA type batteries, and are consequently not as commonly available in physical stores.
Some models of alkaline nine-volt battery contain six LR61 cells connected by welded tabs. These cells are similar to AAAA cells and can be used in their place in some devices, even though they are shorter.
See also Battery (electricity) Battery nomenclature Battery recycling List of battery types
References
External links Technical drawing of AAAA alkaline battery, based on ANSI specifications